Magnet valve



April 14, 1925. l,533,l28

G. w.y MEYERs MAGNET VALVE Filed Nov. 50, 1920 VIII INVENTOR BY'ATToRNl-:pgl

Patented Apr. 14, 1925.`

UNITED s TnTEs 1,533,128 PATENT OFFICE. i

Gaone! W. lnrnns, or runway, NEW JERSEY, assroNon. To NATIONAL:PNEUnA'rIc conan, or NEW You, N. Y., a comonmron or WEST VIRGINIA.

IAGNET VALVE.

Application led November 30, 1920. Serial lo. 427,431. I

To allwhom it may concern:

Be it known that I, .GEORGE W.f Mams, a citizen of the United States,residin at Rahway, county of Union, State of ew Jersey, have made acertain new and useful' Invention in Magnet Valves, of which thefollowing is a specification. l

This invention relates to improvements in electromagnetic control valvesof the type described in Patent No. 1,300,781, issued April 15, 1919, toRowntree, which valves are adapted, among other purposes, for use inconnection with electro-magnetic control fluid pressure actuated motorsfor o eratmg doors, tes, and other devices, whic are to be put intooperation at various times by operating motors.

The objects of `my invention include the rovision of an electricallyoperable valve, or controllin the pressure 1n Huid pressure motors, wich is certain and 'eilicient in operation, yet simple and rug ed incony struction, to there y admit o ready assembling and easy ins ctionor repalr.

A further object of t e invention is to provide means for protectin themagnet coil against injury, and to de nitely locate and fix the magneticcentre.

A further object includes the provislon of a simple adjustable valvestructure which can be removed and replaced as a unit, and in which theoperating parts are reduced to a Other objects of the invention willappear more fully hereinafter.

I attain these objects by the mechanism illustrated in the accompanyingdrawings, of which- Fig. 1 represents a sectional elevation of thestructure embodying my invention;

Y Fig. 2 represents a cross-section in part on lines 2-2 of Fig. 1,looking in the dlrection of the arrows;

Fig. 3 represents the valve structure in longitudinal section; p

Fig. 4 represents the valve head and stem;

Fig. 5 represents a cross section of the valve head; and

Fig. .6 represents a section of the central core stem. I

Similar numerals refer to similar parts throughoutjhe several views.

vReferring now to the drawing, 7 represents the outer protective housingor casing which is integrally connected with the supporting base 8 andhas a removable cover 9. The cover is held in position by any,convenient means, as by screws 10.

The base is rovided with a longitudinal bore centrally ocated, intowhich is adjustably screwed at 12, the valve unit shown in Fig. 3, theconstruction and operation of which will be explained more in'detailhereinafter. In the o posite end of this bore there is firmly fixe as bya screw-thread 13, a central core stem 14, of iron or magnetic material,having an enlarged body portion 15 for supporting the solenoid withflattened sides 16, for adjustment, and a conical part or head 16', toaid in centering the movable core. This core stem is also provided with.a central bore of comparatively small diameter, but having an enlargedportion at the conical end. Within this bore there is slidabl mounted anoperating stem 17, havin a ea-d 18, for operating the valve, as wi 1 beexplained more fully below. Upon' the body portion of the central corestem there is mounted the solenoid support 19, of insulatin material,which carries the solenoid 20 wit its supporting core lining tube 21,preferabl of cop er or'non-magnetic material, an solenoi sheath 22 of amagnetic metal. The insulating base is provided with binding screws 23and 23', for the solenoid terminals 24 and 24'. The solenoid is furtherprotected with insulating washers 2 5 and 26, and a magnetic shield 27,all of which are held in placeby the core lining tube 21. To' facilitateassembling and re air washer 25 is rlotativelyl mounted on tu 21, and isprovided with an opening 25', as shown in dotted lines in Fig. 2. Bysimply rotating the washer through 180, more or less, to cover theterminal connections, complete protection is afforded forV saidconnections. The protective sheath 22, not only'protects the coilagainst injury before or vduring assemblin but also serves to locate anddefinitely x the magnetic 100 centre of the coil in the head portion ofthe operating core described below.

Within the core lining tube 21, there is slidably mounted the movableoperating core 28, having a countersunk solid hea-d 105 portion 28', atone end, and a well 29, of comparatively large diameter, extending intothe core from the other end. This end carries also extension 29' forincreasing pull of armature at low voltages. The solid 11o counter-sunk,head ortion rests directly upon the conical hea 18 of the valveoperating stem 17, so as to constantly and automatica-lly; center itselfthereupon, and (li-' terial, having screw threaded parts 3l and 31', foradjustable attachment -in the bore 12,-and annular depressions 32 and 32for a'ir ducts, as will beV explained below. The unit valve `base isprovided with a 'bore 33 of comparatively large diameter extending intothe valvev base and terminating in a smalle-r centrally located air duct34, and formed into a valve seat at 35. Communicating with the centralair duct 34 is air duc-t 36, wliic-lr in turn communicates with theannular chamber 37 and the air supply duct 38.

A valve head 39, having a valve seat closure 40, at one end, and a valveguide stein 41, at the other', is slidably mounted and fitted Within thevalve. bore. Intermediate the v ends of the valve head are piston-ring`extensions 42, provided with passages 43. Infthe upper part of the valvebore, by screw threads or other means for adjust.- ment, there is fittedavguicle plug 44, having a central escape passage 45, and a valve seat46. It will be observed that guide plug 44 is adjustable so that thedistance between valve seats 35 and 46 may be properly adjusted Whenevernecessary or desirable.` o

A spring 47 normally holds the valve head in a closed position againstvalve seat 46, thus preventing the escape of the operating medium, thepressure of which also aids in keeping the valve seated. When the valveis unseated, however, as when the coil l is energized, or when the valvehead is I an adjustable valve plug in one end of said otherwisedepressed, the pressure 'medium employed escapes through passage 43, topassage 45, and out to the open atmosphere through the opening 49.

When air is employed as the operating medium for the motor or operatingcylinder with which the valve mechanism is in direct communication, andwith the valve in position as shown in Fig. 1, pressure is maintained inthe operating cylinder due to the direct and open communication with thesource of supply through the supply duct 38, annular chamber 37, valvel35,` and through cylinder supply or exhaust passage If it is nowdesired to cause the valve to operate vthe operating mechanisfn -towhich itis applied, the solenoid is energized by any suitable means,thus pulling down the operating core, which communicates its motion tothe valve stem and valve head rthrough vthe operating'stem 17, and thusunseating the valve and opening the exhaust to the air in the mannerdescribed,y above, for the operation of said motor.

Therefore, having now set forth the obwith an energizing coil and acontro'l valve for controlling fluid pressure in an operating motor, of'a fixed core stem terminating in a beveled head en'd, v a pinprojecting from said 'head end, anda movable core ivithin said coilhaving a concave seat for centering on said pin head for operating saidvalve.

2. In an electro-magnetic valve, the coni-` bination with an energizingcoil and a control valvc for controlling fluid pressure in an operatingmotor, of a fixed core stem terminating in a beveled head end andprovided with a bore, a. pin mounted in said bore, a self centeringoperating core Within said coil seated on said pin, and means carried bysaid core for manually operating said valve. j

3. In an electro-magnetic valve, the com'- bination with an energizingcoil and a control valve mounted ina unit valve Ybase and housing forcontrolling fluid pressure in an operating motor, of a fixed core stemmount- 'ed in said valve base and projecting into said coil, said corestem being provided with a bore, a pin in said bore, an insulating basecarried by said core stem for supporting said coil, an operating coreWithin said coil, and means carried by said operating core for effectingthe operation of said valve.

4.' 4An electro-magnetic valve comprising a unitary valve base andmagnetic coil lions# ing, said base being provided with a bore,`l

bore, a valve in said plug, 'a fixed coresteni in the` other end of saidbore and extending' into said housing, said stein being provided with abore, a bevel headed pin in said bore,

an insulation base carried on said fixed core stem, a coil carriedlbysaid base, said coil iis y being provided with an inner non-magneticshield and an outer magnetic shield, and a floating core extending intosaid coil and centered on said pin-head for effecting the operation ofsaid valve when the coil is energized.

5. The combination, in a magnet valve, of a supporting base and anenergizing coil carried'on said base, ofv a. pressure control valveadjustably mounted on said base in central alignment with said coil, amovable operating core Within said coil, a. stem onl said' base forfixedly supporting, said coil and having a countersunk bore, and a.beveled headed pin carried by said stem in said countersunk bore forpositioning the operating core, and for limiting and transmitting itsmovement to the control valve.

6. In a magnet valve, the combination with an energlzing coil and acontrol valve for controlling fiuid pressure inan` operatin motor, of afixed core stem, and a movab e core within said coil for operatin saidvalve, said movable core being provide with a central well, a pin insaid well for manually effecting the operation of said control valve,and a protective shield for saidcoil.

7. As an article,I of manufacture, an adjustable unit pressure controlvalve, comprising a valve base 'provided with pressure medium ports, afixed valve seat and an adjust- N lable valve seat within said base, andmeans fluid pressure in an operating mechanism,

comprising a one piece adjustable valve base provided with fluidpressure medium ports intermediate the ends thereof, an adjustable valveplug in one -end'of said base, and a valve seat in said plug, a fixedvalve seat near the other end of said base, and a double seatingpressure control piston operating to v close one port upon opening ofthe other and vice versa.

In testimony whereof I have hereunto set GEORGE. W.l MEYERS.

my hand on this 18 day .of November, A. D. 1,. 1920, f

